Finding the Fourth Proportional to 76,623.71, 105,738.06 and 42,165.23

Step by Step Solution

1. Step 1: Write the proportion equation
   76,623.71 : 105,738.06 = 42,165.23 : x
2. Step 2: Convert to fraction form
   76,623.71/105,738.06 = 42,165.23/x
3. Step 3: Cross multiply
   76,623.71x = 105,738.06 × 42,165.23
4. Step 4: Simplify right side
   76,623.71x = 4,458,469,090.96
5. Step 5: Solve for x
   x = 4,458,469,090.96/76,623.71
6. Step 6: Final answer
   x = 58,186.55